//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
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// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// * By using,  copying,  modifying or  distributing the software (or *
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//
//
// Author: Mathieu Karamitros

// The code is developed in the framework of the ESA AO7146
//
// We would be very happy hearing from you, send us your feedback! :)
//
// In order for Geant4-DNA to be maintained and still open-source,
// article citations are crucial. 
// If you use Geant4-DNA chemistry and you publish papers about your software, 
// in addition to the general paper on Geant4-DNA:
//
// Int. J. Model. Simul. Sci. Comput. 1 (2010) 157–178
//
// we would be very happy if you could please also cite the following
// reference papers on chemistry:
//
// J. Comput. Phys. 274 (2014) 841-882
// Prog. Nucl. Sci. Tec. 2 (2011) 503-508 

#ifndef G4AllITFinder_h
#define G4AllITFinder_h 1
#include "globals.hh"
#include "G4ITType.hh"
#include "G4ThreeVector.hh"
#include "G4KDTreeResult.hh"

#include <map>
#include <vector>
#include <memory>

class G4IT;
class G4VITFinder;
class G4ITBox;
class G4Track;
template<typename T>
  class G4ITFinder;

/**
 * Holds all IT Manager, and take care of deleting them
 * when AllITManager is deleted
 * Set general verbose for all IT Manager
 */

class G4AllITFinder
{
public:
  static G4AllITFinder* Instance();
  static void DeleteInstance();
  /**
   * To delete the Instance you should use DeleteInstance()
   * rather than the destructor
   */

  ~G4AllITFinder();

  G4VITFinder* GetInstance(G4ITType);
  G4ITBox* GetBox(const G4Track*);

  void RegisterManager(G4VITFinder* manager);
  void Push(G4Track* track);

  /**
   * Set General verbose for all IT Manager
   * See ITManager builder
   */
  void SetVerboseLevel(G4int level)
  {
    fVerbose = level;
  }
  G4int GetVerboseLevel()
  {
    return fVerbose;
  }

  void UpdatePositionMap();

  template<typename T>
    inline G4KDTreeResultHandle FindNearest(const G4ThreeVector& pos,
                                            const T* it);
  template<typename T>
    inline G4KDTreeResultHandle FindNearest(const T* it0, const T* it);
  template<typename T>
    inline G4KDTreeResultHandle FindNearestInRange(const G4ThreeVector& pos,
                                                   const T* it,
                                                   G4double range);
  template<typename T>
    inline G4KDTreeResultHandle FindNearestInRange(const T* it0,
                                                   const T* it,
                                                   G4double range);

private:
  G4AllITFinder();
  static G4ThreadLocal G4AllITFinder* fpInstance;
  std::map<G4ITType, G4VITFinder*> fITSubManager;

  int fVerbose;
};

template<typename T>
  inline G4KDTreeResultHandle G4AllITFinder::FindNearest(const G4ThreeVector& pos,
                                                         const T* it)
  {
    return G4ITFinder<T>::Instance()->FindNearest(pos, it);
  }

template<typename T>
  inline G4KDTreeResultHandle G4AllITFinder::FindNearest(const T* it0,
                                                         const T* it)
  {
    return G4ITFinder<T>::Instance()->FindNearest(it0, it);
  }

template<typename T>
  inline G4KDTreeResultHandle G4AllITFinder::FindNearestInRange(const G4ThreeVector& pos,
                                                                const T* it,
                                                                G4double range)
  {
    return G4ITFinder<T>::Instance()->FindNearestInRange(pos, it, range);
  }

template<typename T>
  inline G4KDTreeResultHandle G4AllITFinder::FindNearestInRange(const T* it0,
                                                                const T* it,
                                                                G4double range)
  {
    return G4ITFinder<T>::Instance()->FindNearestInRange(it0, it, range);
  }

#endif